Outlining torque reaction vibration experiments for the Goshawk engine.
| Identifier | WestWitteringFiles\K\September1923\ Scan111 | |
| Date | 20th September 1923 | |
| R.R. 235a (100 T) S H. {Arthur M. Hanbury - Head Complaints} 159 (1-8-20) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 TO HS {Lord Ernest Hives - Chair} ) FROM E. {Mr Elliott - Chief Engineer} c.c. to OJ. BY. {R.W. Bailey - Chief Engineer} ORIGINAL El/M20.9.23. X4604 TORQUE REACTION VIBRATION EXPERIMENTS. The experiments that Mr. Royce would like you to make in connection with the above are outlined by him as follows:- ENGINE SUSPENSION. (1) Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) ll. present suspension plus rigid damping forward. See LeC.1768. (2) Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) ll. four rigid feet. Is this super-ior to two rigid feet forward? (3) Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) l. This engine has now flexible mount-ing in all lateral directions and is understood to give large amplitude vibrations at low speed. Fit with rigid dampers both fore and aft. Try these with var-ious degrees of vigour until they become four solid arms. See LeC.1767. (4) Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) ll. Get the masses so balanced that the suspension is at the centre of gyration, first by adding weights, and second if successful alter the centre of suspension. If satisfactory control engine by frame with flexible arms forward, with rigid dampers forward in parallel, and rigid dampers back, either or both. (5) Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) ll. Deep flitch plate added to the frame especially in connection with experiment (2). E. {Mr Elliott - Chief Engineer} [Signature] | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).